Addition of [Mo2VO2(μ-O)(μ-S)(aq)]2+ linker-type units to a solution/dynamic library containing tungstates results via the formation of the complementary pentagonal {(W)W5} units logically in the self-assembly of a mixed oxide/sulphide {WVI72MoV60}-type Keplerate, thereby demonstrating the ability to tune the capsule's skeletal softness (the (μ-O)2 and (μ-S)2 scenarios are known) and providing options to influence differently important capsule–substrate interactions.